mStream

mStream is a self-hosted music streaming server for syncing and playing your music library across devices. It is built for people who want to browse, play, and manage their collection from a server instead of keeping files on one machine.

Its filesystem-based API mirrors your folder structure, so you can browse and play before a database is built, upload files, and create directories. It transcodes on the fly with ffmpeg, plays audio on headless boxes, fetches album art, downloads from YouTube via yt-dlp, and manages Transmission, Deluge, and qBittorrent torrents. The Subsonic API and DLNA/UPnP are also supported.

A multi-threaded Rust scanner keeps it light on memory and CPU even with multi-terabyte libraries. It runs publicly by default and becomes password-protected once you add a user, with web and mobile clients and SQLite storage.